A STUDY OF THE FRAGMENTATION OF QUARKS IN E(-)P COLLISIONS AT HERA

被引:46
作者
AID, S
ANDREEV, V
ANDRIEU, B
APPUHN, RD
ARPAGAUS, M
BABAEV, A
BAEHR, J
BAN, J
BAN, Y
BARANOV, P
BARRELET, E
BARSCHKE, R
BARTEL, W
BRATH, M
BASSLER, U
BECK, HP
BEHREND, HJ
BELOUSOV, A
BERGER, C
BERNARDI, G
BERNET, R
BERTRANDCOREMANS, G
BESANCON, M
BEYER, R
BIDDULPH, P
BISPHAM, P
BIZOT, JC
BLOBEL, V
BORRAS, K
BOTTERWECK, F
BOUDRY, V
BRAEMER, A
BRASSE, F
BRAUNSCHWEIG, W
BRISSON, V
BRUNCKO, D
BRUNE, C
BUCHHOLZ, R
BUNGENER, L
BURGER, J
BUSSER, FW
BUNIATIAN, A
BURKE, S
BURTON, M
BUSCHHORN, G
CAMPBELL, AJ
CARLI, T
CHARLES, F
CHARLET, M
CLARKE, D
机构
[1] RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY
[2] RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY
[3] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
[4] FREE UNIV BRUSSELS,INTERUNIV INST HIGH ENERGIES,BRUSSELS,BELGIUM
[5] UNIV INSTELLING ANTWERP,B-2610 WILRIJK,BELGIUM
[6] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND
[7] INST NUCL PHYS,KRAKOW,POLAND
[8] UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA
[9] UNIV CALIF DAVIS,IIRPA,DAVIS,CA
[10] UNIV DORTMUND,INST PHYS,W-4600 DORTMUND,GERMANY
[11] CEA SACLAY,DAPNIA,DSM,GIF SUR YVETTE,FRANCE
[12] UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW,LANARK,SCOTLAND
[13] DESY,W-2000 HAMBURG,GERMANY
[14] UNIV HAMBURG,INST EXPTL PHYS 1,HAMBURG,GERMANY
[15] UNIV HEIDELBERG,INST PHYS,HEIDELBERG,GERMANY
[16] UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY
[17] UNIV HEIDELBERG,INST HOCHENERGIEPHYS,HEIDELBERG,GERMANY
[18] CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL,GERMANY
[19] SLOVAK ACAD SCI,INST PHYS EXPTL,KOSICE,SLOVAKIA
[20] UNIV LANCASTER,SCH PHYS & MAT,LANCASTER,ENGLAND
[21] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND
[22] UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND
[23] LUND UNIV,DEPT PHYS,LUND,SWEDEN
[24] UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND
[25] INST THEORET & EXPTL PHYS,MOSCOW 117259,RUSSIA
[26] UNIV AIX MARSEILLE 2,CPPM,IN2P3,CNRS,MARSEILLE,FRANCE
[27] MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY
[28] UNIV PARIS 11,LAL,IN2P3,CNRS,ORSAY,FRANCE
[29] ECOLE POLYTECH,LPNHE,IN2P3,CNRS,PALAISEAU,FRANCE
[30] UNIV PARIS 06,LPNHE,PARIS,FRANCE
[31] UNIV PARIS 07,LPNHE,PARIS,FRANCE
[32] CHARLES UNIV,CTR NUCL,PRAGUE,CZECH REPUBLIC
[33] IST NAZL FIS NUCL,ROME,ITALY
[34] UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY
[35] PAUL SCHERRER INST,VILLIGEN,SWITZERLAND
[36] BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,WUPPERTAL,GERMANY
[37] DESY,INST HOCHENERGIEPHYS,ZEUTHEN,GERMANY
[38] ETH ZURICH,INST TEILCHENPHYS,ZURICH,SWITZERLAND
[39] UNIV ZURICH,INST PHYS,ZURICH,SWITZERLAND
[40] CNRS,IN2P3,PARIS,FRANCE
关键词
D O I
10.1016/0550-3213(95)91599-H
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Deep inelastic scattering (DIS) events, selected from 1993 data taken by the H1 experiment at HERA, are studied in the Breit frame of reference. The fragmentation function of the quark is compared with those of e(+)e(-) data. It is shown that certain aspects of the quarks emerging from within the proton in e(-)p interactions are essentially the same as those of quarks pair-created from the vacuum in e(+)e(-) annihilation. The measured area, peak position and width of the fragmentation function show that the kinematic evolution variable, equivalent to the e(+)e(-) squared centre of mass energy, is in the Breit frame the invariant square of the four-momentum transfer. We comment on the extent to which we have evidence for coherence effects in parton showers.
引用
收藏
页码:3 / 21
页数:19
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